Browse lakes and reservoirs
Named lake-type waterbodies with a populated record: assessment verdicts, listed impairment causes, or a linked USGS gauge. Data updated 2026-08-17.
Waterbodies
Showing 10,251–10,300 of 15,611
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All New Hampshire 2,233 Minnesota 1,939 Wisconsin 1,219 Florida 973 Michigan 776 Vermont 712 Massachusetts 678 New Jersey 588 South Carolina 473 Illinois 439 New York 428 Washington 385 Texas 323 Kansas 304 Maine 302 Alabama 263 Nebraska 250 Pennsylvania 246 California 195 Virginia 193 Idaho 186 South Dakota 176 North Dakota 174 Oklahoma 173 Missouri 170 Iowa 167 Oregon 167 Indiana 162 Rhode Island 126 Colorado 122 Kentucky 108 Georgia 98 Connecticut 97 North Carolina 92 Utah 84 Louisiana 74 Tennessee 73 Arkansas 69 New Mexico 58 Montana 52 Nevada 50 Delaware 46 Arizona 44 West Virginia 44 Maryland 37 Mississippi 14 Alaska 12 Wyoming 8 Ohio 7 Hawaii 2
| Waterbody | State | Status | Causes |
|---|---|---|---|
| Old Reservoir | MA | Not Supporting | 1 |
| Old River - Car Barn Pond | NH | Not Supporting | 1 |
| Old School | IL | Not Supporting | 2 |
| Old Taylor Lake | WI | Not Supporting | 1 |
| Old Town Lake | AR | Not Supporting | 1 |
| Old Town Pond | NY | Not Supporting | 1 |
| Old Womans Creek | VA | Not Supporting | 1 |
| Oldham Lake | IA | Fully Supporting | 0 |
| Oldham Pond | MA | Not Supporting | 3 |
| Oldmans Creek (above Commissioners Rd) | NJ | Not Supporting | 3 |
| Oldmans Creek (Kings Hwy to Rt 45) | NJ | Not Supporting | 5 |
| Oldmans Creek (Rt45 to Commissioners Rd) | NJ | Not Supporting | 2 |
| Ole | MN | Not Supporting | 1 |
| Olin Basin | AL | Not Supporting | 2 |
| Olin Lake | IN | Not Supporting | 1 |
| Olive Creek Lake | NE | Not Supporting | 5 |
| Oliver (east portion) | MN | Not Supporting | 2 |
| Oliver (west portion) | MN | Not Supporting | 2 |
| Oliver Lake | GA | Not Supporting | 3 |
| Oliver Lake (Put & Take Trout) | IN | Not Supporting | 1 |
| Oliver Reservoir | NE | Not Supporting | 3 |
| Oliverda Lake | MI | Not Supporting | 1 |
| Oliverian Brook Pond | NH | Not Supporting | 1 |
| Olney East Fork | IL | Not Supporting | 2 |
| Olney Pond | RI | Not Supporting | 1 |
| Olpe City Lake | KS | Not Supporting | 2 |
| Olson | MN | Not Supporting | 1 |
| Olympus Pool | VT | Fully Supporting | 0 |
| Omaha | IL | Not Supporting | 2 |
| Omega Pond | RI | Not Supporting | 6 |
| Onapa Lake (Checotah Municipal) | OK | Fully Supporting | 0 |
| One | MN | Not Supporting | 1 |
| One Pine | MN | Not Supporting | 1 |
| Oneida Lake | NY | Not Supporting | 1 |
| Oneida Lake | WI | Fully Supporting | 0 |
| Oneida Narrows Reservoir | ID | Not Supporting | 2 |
| ONeill Forebay | CA | Not Supporting | 1 |
| Oneonta Lake | WI | Not Supporting | 1 |
| Ong Run / Jacks Run | NJ | Not Supporting | 4 |
| Onion Valley Reservoir | NV | Not Supporting | 2 |
| Onland Lake | WI | Fully Supporting | 0 |
| Onondaga Lake, northern end | NY | Not Supporting | 5 |
| Onondaga Lake, southern end | NY | Not Supporting | 9 |
| Onota Lake | MA | Not Supporting | 5 |
| Onway Lake | NH | Not Supporting | 3 |
| Onway Lake - Camp Onway Beach | NH | Not Supporting | 1 |
| Onway Lake - Raymond Town Beach | NH | Not Supporting | 1 |
| Oologah Lake | OK | Not Supporting | 2 |
| Opechee Bay | NH | Not Supporting | 2 |
| Opechee Bay - Bond Beach | NH | Not Supporting | 2 |
Source: EPA ATTAINS and USGS National Water Information System State Integrated Report assessment decisions + USGS daily values · 2026